Size-resolved online chemical analysis of nanoaerosol particles : a thermal desorption differential mobility analyzer coupled to a chemical ionization time-of-flight mass spectrometer

  • A new method for size-resolved chemical analysis of nucleation mode aerosol particles (size range from ∼10 to ∼30 nm) is presented. The Thermal Desorption Differential Mobility Analyzer (TD-DMA) uses an online, discontinuous principle. The particles are charged, a specific size is selected by differential mobility analysis and they are collected on a filament by electrostatic precipitation. Subsequently, the sampled mass is evaporated in a clean carrier gas and analyzed by a chemical ionization mass spectrometer. Gas-phase measurements are performed with the same mass spectrometer during the sampling of particles. The characterization shows reproducible results, with a particle size resolution of 1.19 and the transmission efficiency for 15 nm particles being slightly above 50 %. The signal from the evaporation of a test substance can be detected starting from 0.01 ng and shows a linear response in the mass spectrometer. Instrument operation in the range of pg m−3 is demonstrated by an example measurement of 15 nm particles produced by nucleation from dimethylamine, sulfuric acid and water.

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Author:Andrea Christine Wagner, Anton Bergen, Sophia Brilke, Claudia Fuchs, Markus Ernst, Jesica Hoker, Martin Heinritzi, Mario Simon, Bertram Bühner, Joachim CurtiusORCiD, Andreas Kürten
Parent Title (English):Atmospheric measurement techniques
Publisher:Copernicus Publ.
Place of publication:Göttingen
Contributor(s):Johannes Schneider
Document Type:Article
Year of Completion:2018
Date of first Publication:2018/10/08
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2019/02/26
Page Number:18
First Page:5489
Last Page:5506
© Author(s) 2018. This work is distributed under the Creative Commons Attribution 4.0 License.
Institutes:Geowissenschaften / Geographie / Geowissenschaften
Wissenschaftliche Zentren und koordinierte Programme / Starker Start ins Studium: Qualitätspakt Lehre
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 55 Geowissenschaften, Geologie / 550 Geowissenschaften
Open-Access-Publikationsfonds:Geowissenschaften / Geographie
Licence (German):License LogoCreative Commons - Namensnennung 4.0